Hardinge HNC retrofit and where to start

More
17 Jul 2012 23:04 #22110 by andypugh
JR1050 wrote:

You would be WAY ahead of the game to buy some inexpensive encoders

I had imagined that the resolvers were more tightly integrated into the motors than appears to be the case. My servos have them inside the back of the case, and I would be looking at trying to source new connector inserts ($20 + the pins each) or the pin-removal tool ($100s) to change the wiring to suit encoders. I would also need to find some form of commutating encoder too, as mine are AC servos reliant on the absolute feedback that resolvers give.

FWIW the Mesa 7i49 Resolver driver emulates the encoder index behaviour, so if the Resolver is a one-cycle-per-rev type (less than certain) then it would be usable for all the normal LinuxCNC spindle encoder things.

It's moderately easy to tell how many cycles-per-rev the resolver is. Power up the drives and put a multimeter in the AC range on one of the secondaries, then rotate the spindle. If you see the amplitude drop to zero more than once a rev then you would need to wire up a separate index or change it to an ABZ encoder.

Please Log in or Create an account to join the conversation.

More
18 Jul 2012 03:01 - 18 Jul 2012 03:02 #22112 by bobinater
as promised I will try to upload more photos of what I have to work with.


Attachments:
Last edit: 18 Jul 2012 03:02 by bobinater. Reason: same photo 3 times

Please Log in or Create an account to join the conversation.

More
18 Jul 2012 03:03 #22113 by bobinater
Attachments:

Please Log in or Create an account to join the conversation.

More
18 Jul 2012 03:04 #22114 by bobinater



Andy


check this out talk about lots of wiring
Attachments:

Please Log in or Create an account to join the conversation.

More
18 Jul 2012 03:06 #22115 by bobinater



I assume this is the turret encoder, all I have seen online have the insulation removed

is that necessary or is it for repair?

Bob
Attachments:

Please Log in or Create an account to join the conversation.

More
18 Jul 2012 03:08 #22116 by bobinater
Attachments:

Please Log in or Create an account to join the conversation.

More
18 Jul 2012 03:10 - 18 Jul 2012 03:13 #22117 by bobinater




Is this any use to anyone or should I put it on e-bay?


rybett camstore.
Attachments:
Last edit: 18 Jul 2012 03:13 by bobinater.

Please Log in or Create an account to join the conversation.

More
18 Jul 2012 03:14 #22118 by bobinater
Attachments:

Please Log in or Create an account to join the conversation.

More
18 Jul 2012 03:16 #22119 by bobinater
Attachments:

Please Log in or Create an account to join the conversation.

More
18 Jul 2012 03:18 #22120 by bobinater
Attachments:

Please Log in or Create an account to join the conversation.

Moderators: cncbasher
Time to create page: 0.089 seconds
Powered by Kunena Forum